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alexandr402 [8]
3 years ago
12

A line contains the points a(-9,y) and b(-7,-2) find the value of y so the line has a slope of -3

Mathematics
1 answer:
harina [27]3 years ago
3 0

Answer:

y = -8

Step-by-step explanation:

To find the value for y, use the slope formula:

m = \frac{y_2-y_1}{x_2-x_1}

Substitute m = 3 and (-9,y) and (-7,-2).

-3 = \frac{y--2}{-7--9} \\\\-3 = \frac{y+2}{-7+9}\\\\ -3 = \frac{y+2}{2}\\\\-6 = y + 2\\\\-8 = y

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